If you prefer to attempt a manual transfer of your Thunderbird data, as opposed to just doing an automatic transfer of Thunderbird and other apps, you can do that using a USB stick or a USB drive. We will cover both in this guide, although if you prefer to just skip to the easier, automatic option, you can click here for automatic transfer of Mozilla Thunderbird from one computer to another. There are two primary ways to copy Thunderbird to another computer – manual copy and automatic copy. To do that, we need to copy your Thunderbird profile, along with emails, folders, profile customizations, archives, accounts, passwords, email settings, extensions, themes and so on – a complete transfer. The goal is to have Thunderbird on the new computer look and behave exactly as on the old one. Our goal, of course, is not to just install Thunderbird on the new computer.

Need to transfer Mozilla Thunderbird to a new computer? This tutorial will show you how to do just that. How to Transfer Mozilla Thunderbird to a New Computer with Windows 11 or Windows 10

Backing up mozilla thunderbird profile